I fail to understand why non-developers do need to run a development version of chromium-browser.
Version 9.0.597.98~r74359-1 is available directly in the trusted Debian repositories, and is stable.
Greetings,
Chris

I fail to understand why non-developers do need to run a development version of chromium-browser.

I think "need" is perhaps not the best standard for the choices made by aptosid users. After all, many are here using this distribution of GNU/Linux to experience the newest versions that a non-developer would dare to run on his or her personal computer for every day use. For those who absolutely need 100% stability, or don't ever want to see a bug, there is Debian Stable (or Mepis, etc.). IMHO.